03-25-2013 07:03 AM
Welcome to BlackBerry Support Forums
Please try this :
On your Homescreen go to Options> Device > Aplication Management > Delete BlackBerry Messenger from that list .
KB10040 : How to view or remove installed application on a blackberry smartphone
Once it is done perform a battery pull restart by removing the battery while your device is Powered On , wait a min then reinsert it back.
To Reinstall BlackBerry Messenger from your BlackBerry browser browse to www.blackberry.com/bbm to download the most recent available for your device. after installation reboot your device .
please try it .